I am reporting this here because I cannot wait for Quicken support to do anything. They obviously have not found and fixed the problem in years.
I last reconciled my checking account 2+ months ago and all was fine. Today I could not reconcile the next month and all transactions since last reconcile were correct. Then I noticed the previous balance for reconciling was NOT my statement balance for the last reconcile and the new balance was off by exactly the amount that reconcile was off.
I fixed the problem by adding an adjustment transaction for the missing expense and reconciled the last 2 months. I then checked the current register balance against my online bank balance and it was correct after accounting for uncleared items. SO, QUICKEN [Removed - Language] MY REGISTER BALANCE AGAIN!
This is not the first time I have had similar problems and I have seen the problems change my account opening balance and think this one may have done that because it is now a negative value. My current Quicken version is R56.9 (build 27.1.56.9). I feel like there was an update since the last reconcile but am not sure.
This account has records from 2005 onward.